Q: 117 (IAS/2010)

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Each person's performance compared with all other persons is to be done to rank them subjectively. How many comparisons are needed in total, if there are 11 persons?
question_subject: 
Maths
question_year: 
2010
question_exam: 
IAS
question_sub_subject: 
Mathematics
question_topic: 
Mathematics
stats: 
0,168,88,48,168,32,8